White Rodgers 37 6186B Users Manual 1F94 371 (37 6186B)

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2015-01-05

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COMFORT-SET 90® SERIES
HEAT PUMP INSTALLATION/CONFIGURATION
This White-Rodgers Automatic Setback
Digital Thermostat uses microcomputer
technology to provide precise time and
1F94-371: 7 Day programming; residen-
tial applications
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC, 50/60 Hz with common
0.05 to 1.5 Amps per terminal
2.5 Amps maximum total load (all
terminals combined)
INSTALLATION
WHITE-RODGERS
Part No. 37-6186B
Replaces 37-6186A
0121
DESCRIPTION
SPECIFICATIONS
temperature control. This thermostat offers
the flexibility to design heating and cooling
programs that fit building needs. This
Standard Systems:
Single-stage or two-stage compressor
heat pump.
THERMAL DATA
Setpoint Temperature Range:
45° to 99°F (7° to 37°C)
Operating Ambient Temperature:
32° to 110°F (0° to 43°C)
Operating Humidity Range:
90% non-condensing max.
Shipping Temperature Range:
-4° to 149°F (-20° to 65°C)
PRECAUTIONS
Do not short out terminals on gas valve
or primary control to test. Short or
incorrect wiring will damage thermostat
and could cause personal injury and/or
property damage.
Do not use on circuits exceeding
specified voltage. Higher voltage will
damage thermostat and could cause
shock or fire hazard.
Thermostat installation and all compo-
nents of the system shall conform to
Class II circuits per the NEC code.
To prevent electrical shock and/or
equipment damage, disconnect electric
power to system at main fuse or circuit
breaker box until installation is
complete.
Read all instructions thoroughly before
beginning installation.
CAUTION
!
WARNING
!This thermostat is intended for use with a
low voltage system. Do not use on a line
voltage system.
Do not exceed ratings shown in the Specifi-
cations section, above. If in doubt about the
electrical ratings of your heating/cooling
system, have it inspected by a qualified
heating and air conditioning contractor or
licensed electrician.
All wiring must conform to local and
national electrical codes and ordinances.
This control is a precision instrument, and
should be handled carefully. Rough handling
or distorting components could cause the
control to malfunction.
NOTE
thermostat is adaptable to most 24 volt
residential forced air heat pump systems with
electric or fossil fuel auxiliary.
2
Figure 1. Thermostat base and terminals
RC
R
C
EW2W1Y2Y1BOG
PH D SASBSCOTL
1
23
4
1
5
W3
A1 E2
P
ATTENTION!
This product does not contain mercury.
However, this product may replace a unit
which contains mercury.
Do not open mercury cells. If a cell becomes
damaged, do not touch any spilled mercury.
Wearing nonabsorbent gloves, take up the
spilled mercury and place into a container
which can be sealed. If a cell becomes
damaged, the unit should be discarded.
Mercury must not be discarded in household
trash. When the unit this product is replacing
is to be discarded, place in a suitable
container and return to White-Rodgers at
9797 Reavis Road, St. Louis, MO, 63123-
5398 for proper disposal.
REMOVE OLD THERMOSTAT
Shut off electricity at main fuse or circuit
breaker box until installation is complete
AND the new thermostat is configured
properly.
Remove the front cover of the old thermo-
stat. With wires still attached, remove wall
plate from the wall.
Identify each wire attached to the thermo-
stat using one of the labels enclosed with the
new thermostat.
Disconnect the wires from the old thermostat
one at a time. DO NOT let the wires fall
back into the wall.
Install the new thermostat using the follow-
ing procedures.
ATTACH BASE TO WALL
Remove packing material from the thermostat.
Place fingers of one hand on the center top
and bottom portion of the thermostat. Grasp
the base in the other hand on top and bottom
center and gently pull straight out. Forcing or
prying on the thermostat will cause damage
to the unit.
Place the base over the hole in the wall
where the wires come out and mark mount-
ing hole locations using the base as a
template. Drill 3⁄16” pilot holes, and install
screw anchors in the wall.
Run wires through hole in base and attach
base to wall (see fig. 1).
Insert the labeled wires into the appropriate
terminals on the base and tighten the
terminal screws.
CONFIGURING AND PROGRAM-
MING
Before the power is turned on, the
thermostat must be configured to operate
properly with the system. See the CON-
FIGURATION section of this manual.
This thermostat can be programmed for
automatic temperature control. Refer to
Operating Instructions for programming.
1Mounting screws
2Pull wires through this opening
3Insert wires into terminal holes, then tighten screws
4Screw anchors
5Jumper connections for remote sensor power
(Do not remove)
INSTALLATION
3
HEAT PUMP TERMINAL OUTPUTS
Refer to equipment manufacturers’ instruc-
tions for specific system wiring information.
You can configure the thermostat for use
with the following heat pump system types:
HEAT PUMP TYPE 1. Single-stage
compressor system; gas or electric backup.
HEAT PUMP TYPE 2. Multi-stage or two-
compressor system; gas or electric backup.
HEAT PUMP TYPE 3. System requiring
separate signals for heat (W1, W2, W3) and
cool (Y1); gas or electric backup.
This thermostat is designed to operate a
single-transformer system. If you have a two-
transformer system, cut and tape off one
transformer. If transformer safety circuits
are in only one of the systems, remove the
transformer of the system with NO safety
circuits. If required, replace remaining
transformer with a 75VA Class II transformer.
After disconnecting one transformer, the two
commons must be jumpered together.
Use the terminal output information below to
help you wire the thermostat properly for
your heat pump system type. After wiring,
see CONFIGURATION section for proper
thermostat configuration.
THERMOSTAT TERMINALS (Upper)
L PH D SA SB SC OT
Malfunction Light X-10 Module Input Not Used Remote Sense A Remote Sense B Remote Sense C Outdoor Sensor
THERMOSTAT TERMINALS (Lower)
SYSTEM
E C R W3/A1 W2 E2/P W1 Y2 Y1 B O G
Single-stage compressor system; gas or electric backup
Heat Pump 1* Emergency
mode first
stage
24 Volt
(Common) 24 Volt
(Hot) Emergency mode
3rd stage
Heat mode 3rd
stage.
Emergency mode
2nd stage.
E2 - Emergency
mode constant
output.
P - All other modes
constant output.
Heat mode
2nd stage No Output
Heat and cool
modes 1st
stage
(compressor)
Energized in
Heat, Off,
Emergency
Mode
Energized in
Cool Mode
Blower/Fan Energized
on call for Heat and
Cool
Multi-stage or two compressor system; gas or electric backup
Heat Pump 2* Emergency
mode first
stage
24 Volt
(Common) 24 Volt
(Hot) Emergency mode
3rd stage Emergency mode
2nd stage.
E2 - Emergency
mode constant
output.
P - All other modes
constant output.
Heat mode
3rd stage
Heat and cool
modes 2nd
stage
(compressor 2)
Heat and cool
modes 1st
stage
(compressor 1)
Energized in
Heat, Off,
Emergency
Mode
Energized in
Cool Mode
Blower/Fan Energized
on call for Heat and
Cool
System requiring separate signals for heat (W1, W2) and cool (Y1); gas or electric backup
Heat Pump 3** Emergency
mode first
stage
24 Volt
(Common) 24 Volt
(Hot)
Heat mode 3rd
stage.
Emergency mode
3rd stage
Heat mode 2nd
stage.
Emergency mode
2nd stage
E2 - Emergency
mode constant
output.
P - All other modes
constant output.
Heat mode
1st stage No Output Cool mode 1st
stage
Energized in
Heat, Off,
Emergency
Mode
Energized in
Cool Mode
Blower/Fan Energized
on call for Heat and
Cool
* If system does not provide connection to E, jumper W1 to E to provide Aux heating in emergency mode.
** If system does not provide connection to E, jumper W2 to E to provide Aux heating in emergency mode.
4
RESET SWITCH
See the Troubleshooting section at the end
of this document for more information about
the function of this switch.
E2/P SWITCH
The E2/P switch is located on the back of the
thermostat body (see fig. 2). This switch
controls how the E2/P terminal of the
thermostat will be energized. When the
switch is in the E2 position (down), the E2/P
terminal will be energized only when in
emergency heat. When the switch is in the P
position (up), the E2/P terminal will always
be energized except when in emergency heat.
Consult the equipment manufacturer or a
qualified heating/cooling service person
before setting this switch. If your system has
no connection to E2/P, no change in the
switch setting is required.
Figure 2. Switch locations on back of thermostat body
CONFIGURATION
1
2
P
E2
S18
S19
INSTALLER CONFIGURATION
BEFORE TURNING POWER ON, please
read the following instructions. Before
operating the system, you must configure
the thermostat to operate properly with
your equipment.
The thermostat, as it comes from the factory,
is configured to operate a standard single
stage heat pump system. In this configura-
tion, the thermostat will turn on the fan
immediately on a call for heat. If you are
unsure whether your system requires the
thermostat to control the fan, contact your
furnace/air conditioning system manufacturer
or a qualified heating/air conditioning
service person.
Your new thermostat has an Installer menu,
which allows you to customize the thermostat
to meet your requirements. (The thermostat
also has a User menu and a Keypad
Lockout menu. These menus are explained
further in the Operating Instructions.)
The menu settings can be changed at any time
to meet system or personal requirements.
ENTERING THE CONFIGURATION
MENUS.
After properly wiring the thermostat, turn on
power to the system. Momentarily press
PROGRAM
RUN
to make certain the
thermostat is in the run program mode, then
press TIME
FWD
and TIME
BACK
at the
same time to enter the User Configuration
menu. When the display changes to the first
item in the configuration menu, release the
buttons. Then press and hold SET
TIME
and
SET
DAY
for approximately 3 seconds to
enter the Installer menu. The display will
change to show the first item on the Installer
menu (multi-stage/heat pump selection). Use
the following text, along with the Installer
table on page 5, to guide you through the
menu.
Once in the menu, you set each item to the
proper selection using or , then
momentarily press TIME
FWD
to change
the display to the next step or TIME
BACK
to return to the previous item.
To exit the menu at any time and return to
program operation, press PROGRAM
RUN
.
HEAT PUMP COMPRESSOR
CONFIGURATION.
(Installer table step 1) Use this item to select
the number of heat pump compressors and
how they are connected.
ELECTRIC HEAT FAN
CONFIGURATION.
(Installer table step 2.) This menu item
determines whether fan control will be
through the thermostat or through the heating
system. If you have an electric heat or other
system that REQUIRES the thermostat to
control the fan, set this item ON. This allows
the thermostat to energize the fan immedi-
ately on a call for heat. If you are unsure if
the system requires the thermostat to control
the fan, contact the equipment manufacturer
or a qualified heating and air conditioning
service person. If your system controls fan
operation (as with most fossil fuel systems),
set this item to OFF. Note that with heat
pump systems, the fan always cycles with the
compressor.
SET CYCLE HEAT, COOL, AUX
(ANTICIPATION).
(Installer table steps 3 through 5). These
items allow the cycle times in heating,
cooling and auxiliary to be increased or
decreased. The factory set values can be
adjusted higher for longer cycles or lower for
shorter cycles.
NOTE: Some manufacturers still instruct you
to set the anticipator to the current draw of
the equipment. That instruction applies only
to mercury bulb or mechanical thermostats; it
does not apply to this digital thermostat. As
configured at the factory, this thermostat will
maintain an accurate temperature. No
further adjustment is necessary, although
you can use these menu items to customize
the performance of the thermostat to your
requirements.
The adjustment range for HEATING is from
9 to 40 for heat pump. The factory preset is
13. The adjustment range for COOLING is
from 9 to 40. The factory preset is 13. The
heating and cooling settings will not go
below 9 because compressors require a
longer cycle. The adjustment range for
AUXILIARY is from 1 to 40. The factory
preset is 6.
(Continued on page 6)
1Reset switch
E2/P switch
2
SWITCHES
5
* NOTE: COMP LOCK OFF permanently
defeats compressor lockout. You must turn
this selection ON if you do not have a
system that already provides compressor
short-cycle protection. Please see “Lockout
Bypass Option” to temporarily override
compressor lockout.
INSTALLER TABLE
1
2
HEAT PUMP
(1) 2 OR 3
3
ELECT HEAT FAN
(ON) OFF
Fan cycles with call for Emergency heat if ON.
Fan always cycles with pump stages.
4
SET CYCLE HEAT
(13) 9 to 40
5
SET CYCLE COOL
(13) 9 to 40
12
ECON
(OFF) ON
15
REMT SEN b
(OFF) ON
16
REMT SEN C
(OFF) ON
Returns to normal operation
STAT SEN L
(ON) OFF
13
HEAT-EMER-OFF-COOL-
AUTO HEAT-EMER-OFF-COOL
14
REMT SEN A
(OFF) ON
Selects Remote Sensor A (connected to SA) if ON.
Selects:
1. one compressor on Y1.
2. two compressors on Y1, Y2.
3. one compressor on W1.
Selects HEAT anticipation adjustment.
Selects COOL anticipation adjustment.
Allows selection of HEAT, EMER and COOL or
HEAT, EMER, COOL and AUTO with SYSTEM
button.
Economizer option. Long Y1 cycles for cooling
with outdoor air
Selects Remote Sensor B (connected to SB) if ON.
Selects Remote Sensor C (connected to SC) if ON.
When OFF, disables local sensor if a remote sensor
is enabled.
PROGRAM
RUN
SET
and SET
(hold for approx.
3 seconds)
TIME
DAY
FWD
FWD
FWD
FWD
FWD
FWD
FWD
FWD
FWD
6
SET CYCLE AUX
(06) 1 to 40
9
HEAT FAN DELAY OFF
(00) 0 to 127 seconds
10
PUMP
(ON) OFF
11
COMP LOCK
(OFF) ON
7
COOL FAN DELAY OFF
(00) 0 to 127 seconds
8
4
4
4
4
4
6
6
6
7
6
6
4
6
6
6
6
6
FAN DELAY ON
(01) 1 to 30 seconds
Selects time delay for fan ON for compressor stages.
Selects time delay for COOL fan OFF.
Selects AUXILIARY stage anticipation adjustment.
Selects time delay for HEAT fan OFF in Emergency
mode only when ELECT HEAT FAN (Step 2) is ON.
Fossil Fuel Kit Alternative option. Turns compressor
OFF if Auxiliary is ON for longer than one minute.
(Heat Pump 1 & 2)
Selects compressor short-cycle protection enabled
or OFF.*
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
TIME
FWD
FWD
FWD
FWD
FWD
FWD
Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS See
Page
NOTE: You must be in the User
Configuration Menu to enter the
Installer Menu. Press TIME
FWD
and TIME
BACK
at same time.
6
These numbers are approximate and represent operation with a typical system. Actual
temperature differentials and run times may vary widely based on your building and equip-
ment, as well as outdoor temperature conditions.
The chart below shows how this adjustment
range affects thermostat performance.
PROGRAMMABLE COOL FAN-OFF
AND FAN-ON DELAY.
(Installer table steps 6 and 7.) These items
allow a selection of 0 to 127 seconds of fan-
off delay after the thermostat has satisfied the
call for cool, or a fan-on delay of 1 to 30
seconds on a call for cool (or heat pump
compressor activation).
The fan-off delay allows the fan to continue
running after the compressor has shut off.
This distributes the cool air that would
otherwise stay trapped in the air conditioning
coils through the ducts. Ideally the timing
would be set so the fan shuts off just as the
cool air is exhausted. If this timing is set too
long the fan may begin blowing warm air
before it shuts off. Shortening the fan-off
delay will prevent this.
A short delay to allow the A-coil to cool
off (or warm up in heat pump) before the
fan turns on may be preferred. This also
allows the compressor and the fan to come
on at slightly different times, which allows
full power to the compressor on start up.
Recommended setting for fan-on delay is
10 seconds or less. A system that does not
have a high head pressure cutout should
have a delay of 10 seconds or less.
PROGRAMMABLE HEAT FAN-OFF
DELAY.
(Installer table step 8.) This item allows a
selection of 0 to 127 seconds of fan-off delay
after the thermostat has satisfied the call for
heat when ELECT HEAT FAN is selected
ON and system is in Emergency mode.
The fan-off delay allows the fan to continue
running after the burner, heating element,
etc. has shut off. This distributes the heat that
would otherwise stay trapped in the ducts.
Ideally the timing would be set so the fan
shuts off just as the warm air is exhausted. If
this timing is set too long the fan may begin
blowing cool air before it shuts off. Shorten-
ing the fan-off delay will prevent this.
PUMP (FOSSIL FUEL KIT ALTER-
NATIVE).
(Installer table step 9) This item controls heat
pump compressor operation with a fossil fuel
auxiliary. This menu item may eliminate the
need for a separate fossil fuel kit, although
we recommend that you consult the heat
pump system manufacturer before using this
feature instead of a kit. This item will allow
the thermostat to turn the heat pump
compressor off if the auxiliary is on for more
than one minute, to prevent compressor head
pressure from getting too high. To use this
feature instead of a kit, select PUMP OFF.
COMPRESSOR LOCKOUT.
(Installer table step 10). This thermostat is
capable of protecting the system against
premature compressor failure by “locking
out” the compressor for at least five minutes
after each cycle. When the thermostat is in
compressor lockout, the word COOL will
flash on the display. With heat pump
systems, the word HEAT will flash if the
lockout occurs during a heat cycle. During
this period, the compressor will not be
energized.
If the system has short-cycle protection, this
item should not need to be enabled. How-
ever, if your system does not have short-
cycle protection, turn COMP LOCK ON.
This will protect the compressor from short-
cycling and potential premature compressor
failure.
Note that COMP LOCK OFF permanently
disables compressor lockout. If you need to
temporarily disable compressor lockout,
please see Lockout Bypass Option.
Lockout Bypass Option
FOR QUALIFIED SERVICE TECH-
NICIANS’ USE ONLY.
HOMEOWNERS SHOULD NOT USE
THIS FEATURE DUE TO POSSIBIL-
ITY OF EQUIPMENT OR PROP-
ERTY DAMAGE, OR PERSONAL
INJURY.
COMPRESSOR SHORT TERM CYCLE
PROTECTION
If this thermostat has been configured to
provide short-cycle protection, during the
5-minute lockout period the thermostat
will lock out the compressor to allow
head pressure to stabilize. To override
this feature for one cycle while testing
thermostat operation, press SET
TIME
and SET
DAY
buttons at the same time.
ECONOMIZER FEATURE.
(Installer table step 11). This item allows
longer Y1 cycles for cooling with outdoor
air.
DISABLING AUTOMATIC
CHANGEOVER MODE.
(Installer table step 12). This thermostat, as
configured at the factory, provides automatic
changeover, which allows the thermostat to
switch between heating and cooling to
maintain temperature. In this configuration,
when you press the SYSTEM button, the
thermostat will go through HEAT-EMER-
OFF-COOL-AUTO. Select HEAT-EMER-
OFF-COOL to disable the automatic
changeover feature.
OPTIONAL REMOTE TEMPERA-
TURE SENSE.
(Installer table steps 13 through 15). Up to
three remote sensors (part # F145-1328) can
be attached to this thermostat to sense indoor
temperature at locations away from the
thermostat. Each sensor may be located as
far as 200 feet away from the thermostat.
This is an excellent feature if the thermostat
is in a poor location for sensing temperature
or if you want to install the thermostat in a
separate room to prevent tampering. (Refer
to the installation instructions included with
the remote sensor for proper installation and
wiring.) After installing and connecting the
remote sensor(s) to the thermostat, use these
menu items to enable each remote indoor
temperature sensor (A, b and/or C). Note that
if SENSOR A, b or C are set to ON in the
menu, but no sensor is installed, or if the
sensor is not functioning, when you exit the
menu, CHECK STAT SYSTEM will be
displayed. To correct this, check for proper
remote sensor installation and wiring. If
necessary, return to the menu and be sure that
the remote sensor items are set correctly.
The temperature at each remote sensor can
be displayed by pressing the light button
twice within one second with the thermostat
in program run or hold mode. Temperatures
at the outdoor and indoor remote sensors will
be displayed with subsequent presses of the
light button in the following order (if
connected): outdoor sensor, sensor L, A, b, C.
HEATING COOLING
Anticipation Value Cycle Length Differential Temperature Cycle Length Differential Temperature
Aux Only 0.4–0.6°F (0.2–0.3°C) N/A1–8 N/A
Shorter Shorter9–20 0.6–1.0°F (0.3–0.6°C) 0.6–1.0°F (0.3–0.6°C)
Longer Longer21–40 1.0–1.6°F (0.6–0.9°C) 1.0–1.6°F (0.6–0.9°C)
(Continued on page 7)
7
(Installer table step 16). If you wish to sense
indoor temperature using ONLY the remote
sensor(s), use this menu item to disable the
temperature sensor in the thermostat
(designated as the L sensor).
When operating with remote sensor(s), the
thermostat will calculate an average of the
sensed temperatures in all enabled sensor
locations (A, B, C and/or L), then display the
average temperature as the room tempera-
ture. During programming, you can also
assign each enabled sensor different
priorities during different program periods.
This allows the system to maintain a
comfortable environment by giving higher
priority to occupied locations. At the same
time, efficient system operation is enhanced
by giving lower priority to unoccupied
locations. For detailed instructions on this
feature, see the Operating Instructions.
After using the Installer menu to properly
configure the thermostat for your system,
press PROGRAM
RUN
.
OUTDOOR TEMPERATURE
SENSE.
This thermostat can also display outdoor
temperature, if you install an outdoor remote
sensor with an outdoor temperature sensor
probe (F145-1378). Refer to the remote
sensor installation instructions for proper
installation and wiring. Refer to the Operat-
ing Instructions to enable this feature and
display outdoor temperature on the thermo-
stat.
OPTIONAL ACTIVATE RUN PRG
BY TELEPHONE
With the optional X-10 Telephone Responder
(Model TR551, Radio Shack catalog RSU#
10037778) and Universal Low Voltage
Module (UM506, Radio Shack catalog RSU#
10037752) installed, you can make a
telephone call to run your program if the
thermostat has been set to Hold or Vacation
Hold. Figure 3 shows typical wiring
connections for installing the X-10 equip-
ment. The switch on the Universal Low
Voltage module must be set to the “Momen-
tary” position.
This option must be enabled on the User
menu (see Operating Instructions).
CHECK THERMOSTAT OPERATION
CAUTION
!
FAN OPERATION
If your system does not have a G terminal
connection, skip to “Heating System”
section.
1. Turn power on to the system.
2. Press PROGRAM
RUN
.
3. Press
FAN
until FAN ON is displayed.
The fan should begin to operate.
4. Press
FAN
until FAN AUTO is
displayed. The fan should stop operating.
HEATING SYSTEM
1. Press PROGRAM
RUN
.
2. Press
SYSTEM
until HEAT is displayed. If
the heating system has a standing pilot,
ensure that it is lit.
3. Press to adjust thermostat setting
above room temperature. The heating system
should begin to operate.
4. Press to adjust temperature below
room temperature. The heating system
should stop operating.
COOLING SYSTEM
To prevent compressor and/or property
damage, if the outdoor temperature is
below 50°F (10°C), DO NOT operate the
cooling system.
1. Press PROGRAM
RUN
.
2. Press
SYSTEM
until COOL is displayed.
3. Press to adjust thermostat setting
below room temperature. The fan should
come on (after the fan-on delay time, if any),
followed by cold air circulation.
4. Press to adjust temperature setting
above room temperature. The cooling system
should stop operating, and the fan should
stop running (after the fan-off delay time, if
any).
HEAT PUMP AUXILIARY
OPERATION TEST
Follow these steps to energize all stages of
heat or cool to permit system checks during
installation.
HEAT: Press to raise temperature
setting to 99°F, then hold for five seconds.
The second and third stage heat relays will
energize immediately for test purposes. The
LED indicator will glow green for first stage
and yellow for second stage.
COOL: Press to lower temperature
setting to 45°F, then hold for five seconds.
The second stage cool relay will energize
immediately for test purposes. The LED
indicator will glow green for first stage and
yellow for second stage.
EMERGENCY: Press
SYSTEM
to select
EMER mode. The LED indicator will glow
red for emergency mode. A flashing light
indicates a malfunction in the system.
C
RPH
1
1
2
4
4
5
3
1
Thermostat terminals
2
X-10 Universal Low Voltage Module
3
X-10 Telephone Responder Module
4
To 115 VAC power source
5
To telephone line
Figure 3. Optional X-10 connection
WHITE-RODGERS
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
TROUBLESHOOTING
RESET BUTTON
If the thermostat does not respond when keys
are pressed, or the thermostat is not operating
properly, you may use the reset button
located on the back of the thermostat body
(see fig. 2). Thermostat programming and
configuration will not be affected by
pressing the reset button. However, the clock
will need to be reset.
RESETTING THERMOSTAT CON-
FIGURATION AND PROGRAM-
MING
The thermostat can be reset back to default
programs and configuration. Removing
power from the thermostat will not reset it,
because the default settings are maintained in
permanent memory. Before resetting the
thermostat, you may want to make note of
the previously selected configuration and
programming. You must reconfigure and
reprogram the thermostat after resetting it
using this method.
To reset the thermostat, press and release
PROGRAM
RUN
, then press the
FAN
,
TIME
BACK
and buttons at the same
time. This will reset the thermostat to factory
default programs and configuration. The
display will momentarily go blank, then all
segments on the display will momentarily be
shown. The thermostat will then go into the
HOLD mode and will maintain factory preset
temperatures.

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